baustin wrote:When the TCU stops responding, I just do a 30-second fuse pull, and then all is good for another month or two. Yes, it is an inconvenience, but not as much as it would be not having remote access to the car.

I'm averaging about 3 months between fuse pulls. Annoying, but I need remote access for preheat in winter.

WetEV#49Most everything around here is wet during the rainy season. And the rainy season is long.2012 Leaf SL Red (Totaled)2014 Leaf SL Red

baustin wrote:Your denying yourself the advantages of a functioning TCU, because of the possibility of a problem. Yes, there are those with TCU issues, but not everyone has been negatively affected. It may cost me a little time, but it has not cost me any more money that would be expected. I upgraded the TCU, when they first became available, in January 2017. I replaced the original battery (almost 5 years old) in September 2017 with an AGM battery. The need for fuse pulls has greatly decreased since then. When the TCU stops responding, I just do a 30-second fuse pull, and then all is good for another month or two. Yes, it is an inconvenience, but not as much as it would be not having remote access to the car.

Fuse pulls, dead batteries... Nope, I expect it fixed before I spend money for this.

baustin wrote:Your denying yourself the advantages of a functioning TCU, because of the possibility of a problem. Yes, there are those with TCU issues, but not everyone has been negatively affected. It may cost me a little time, but it has not cost me any more money that would be expected. I upgraded the TCU, when they first became available, in January 2017. I replaced the original battery (almost 5 years old) in September 2017 with an AGM battery. The need for fuse pulls has greatly decreased since then. When the TCU stops responding, I just do a 30-second fuse pull, and then all is good for another month or two. Yes, it is an inconvenience, but not as much as it would be not having remote access to the car.

Fuse pulls, dead batteries... Nope, I expect it fixed before I spend money for this.

That is your choice, and your decision. We all have different levels of inconvenience we are willing to accept to gain the levels of convenience that we desire.

Hopefully, Nissan is working on a fix, but I don't see a speedy resolution, or a major recall, in the near future. The upgraded TCU has been available for almost 18 months, with no positive updates from the field, or from Nissan.

I haven't had any problems with the TCU since I deleted my "saved charger locations" many months ago (no fuse pulls/12v issues/nothing). In fact, I just returned from a week-long vacation where I was able to retrieve charge status via the app. As was mentioned, there may be other/different issues with different model years (and battery types), but all relevant info about my Leaf is in my sig.

My saga with TCU upgrade on Leaf 2015 SV is over. It was caused by Data Communications settings to be set to manual and no provider selected. Setting it to auto config (AT&T), corrected the connectivity issue. No issues with 12V battery yet, but it seems to be compromised (by deep discharge) as car was parked on dealer lot for months before I got it. TCU works, but complains of poor reception at home, as it blocked by massive Expedition between Leaf and tower. I have moved Expedition into garage as it started to rust too much for my comfort when left outside, so reception got better.

Posted on another thread. Found this thread to be more active.9/12/2018... 2012 working, 2013 Not working. Still getting intermittent Low signal error message. Problem is not consistent.Nissan Support says they are aware of the problem and has escalated the problem. No remedy in sight. Since I haven't seen any new posting... Is this problem solved? Did it set swept under the rug? Did we just Give up?I hope this thread is still live. I hope I'm not the only one having this problem. BTW: Both cars have fresh 12V batteries. 2012 has the new Lizard Battery. Problem started after the 3G upgrade. AT&T says they only provide the service its the Software or Hardware problem. Carwings had me take my car back to check the TCU. got charged $75 to reboot and update TCU. Still problems (Got reimbursed after complained to NissanCare). Service says TCU hardware is working great. Strong Signal, Blames Software. So Support blame hardware, Service (hardware) blames Carewings (Software), Personally I don't care. I just want Nissan to make it work!

I own a 2015 nissan Leaf SV, bought and owned in Canada. I am currently trying to have my TCU upgraded to 3G. I was informed through this site that upgrades on the 2015 model year should be free. My dealer just quoted me $962 to do the upgrade. Unreal. Can anyone provide info for Canadians trying to have this upgrade done on their 2015(free of charge). Any help would be greatly appreciated. Ive been lurking in this forum for years, I've received so much useful advice I cant say thank you enough.

CDNLeafer wrote:I own a 2015 nissan Leaf SV, bought and owned in Canada. I am currently trying to have my TCU upgraded to 3G. I was informed through this site that upgrades on the 2015 model year should be free. My dealer just quoted me $962 to do the upgrade. Unreal. Can anyone provide info for Canadians trying to have this upgrade done on their 2015(free of charge). Any help would be greatly appreciated. Ive been lurking in this forum for years, I've received so much useful advice I cant say thank you enough.

Does the 2G TCU in the car still function? Is 2G service still active in Canada? If so, they are not going to do the upgrade for free. It was done in the states, because 2G service was turned off by AT&T. Since it is a Canadian Leaf, the EV Help Line and Nissan Canada will be your best sources for assistance, if 2G service is turned off and it needs replaced.